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<table border=0 cellpadding=0 cellspacing=0 align=left width=468> <tr><td class="ongletoff" nowrap><img src="/im/onglets/left.gif" height=17 width=7 border=0 align=top><a class="ongletoff" href="/fr/actu/decouvertes/eau/index.asp"onfocus="this.blur();">Ressources&nbsp;en&nbsp;Eau</a><img src="/im/onglets/right.gif" height=17 width=7 border=0 align=top></td><td class="ongletoff" nowrap><img src="/im/onglets/left.gif" height=17 width=7 border=0 align=top><a class="ongletoff" href="/fr/actu/decouvertes/eau/eau_lac.asp"onfocus="this.blur();">Eau&nbsp;du&nbsp;Lac</a><img src="/im/onglets/right.gif" height=17 width=7 border=0 align=top></td><td class="ongleton" nowrap><img src="/im/onglets/left.gif" height=17 width=7 border=0 align=top><a class="ongleton" href="javascript:void(0);"onfocus="this.blur();">Eau&nbsp;de&nbsp;la&nbsp;Nappe</a><img src="/im/onglets/right.gif" height=17 width=7 border=0 align=top></td><td width=500>&nbsp;</td></tr></table><br><img src="/im/spacer.gif" height=10 width=10 border=0 align=top><br><table border=0 cellpadding=0 cellspacing=0 align=left width=468><tr><td class="ongletoff" nowrap><img src="/im/onglets/left.gif" height=17 width=7 border=0 align=top><a class="ongletoff" href="/fr/actu/decouvertes/eau/eau_traitement.asp"onfocus="this.blur();">Traitement&nbsp;de&nbsp;l'eau</a><img src="/im/onglets/right.gif" height=17 width=7 border=0 align=top></td><td class="ongletoff" nowrap><img src="/im/onglets/left.gif" height=17 width=7 border=0 align=top><a class="ongletoff" href="/fr/actu/decouvertes/eau/eau_pression.asp"onfocus="this.blur();">Eau&nbsp;et&nbsp;Pression</a><img src="/im/onglets/right.gif" height=17 width=7 border=0 align=top></td><td class="ongletoff" nowrap><img src="/im/onglets/left.gif" height=17 width=7 border=0 align=top><a class="ongletoff" href="/fr/actu/decouvertes/eau/zone_distribution.asp"onfocus="this.blur();">Zones&nbsp;de&nbsp;distribution</a><img src="/im/onglets/right.gif" height=17 width=7 border=0 align=top></td><td width=500>&nbsp;</td></tr> </table></td> </tr> <tr> <td>  <p>&nbsp;</p>     <p align="justify">Une nappe d'eau souterraine est un r&eacute;servoir naturel        dans lequel l'eau circule dans les vides des graviers. La nappe de l'Arve,        d'une superficie d'environ 30 km&sup2;, est principalement aliment&eacute;e        par l'infiltration des eaux de l'Arve. Couverte par une couche de terrain        imperm&eacute;able, cette eau reste &agrave; l'abri des pollutions et ne        n&eacute;cessite d'autre traitement qu'une faible chloration pour garantir        sa <a href="/fr/actu/labo/index.asp">qualit&eacute; bact&eacute;riologique</a>        pendant son transport dans les conduites. Riche en sels min&eacute;raux,        elle est plus dure que l'eau du lac.<br>       En savoir plus sur la duret&eacute; de l'eau, <a href="/fr/actu/labo/durete.asp">cliquez        ici.</a>      <p><img src="/im/actu/nappe.gif" width="468" height="198" border="0" alt=""></p>  		</td> 	</tr> 	<tr> 		<td colspan=2 align=left><img src="/im/spacer.gif" height="10" width="1" alt="" border="0"> <table border=0> 	<tr> 	<td align=left><a href='https://www.sig-ge.ch/fr/vous/priv/moncompte/login.asp?http://www.sig-ge.ch/fr/vous/priv/moncompte/index.asp' onfocus='this.blur();'><img src=/im/footer/fr/moncompte.gif height="17" border=0 alt=""></a><img  			src="/im/footer/fr/puce.gif" height=17 width=7 border=0 alt=""><a  			href="http://www.sig-ge.ch/fr/vous/priv/commercial/index.asp" onfocus="this.blur();"><img src=/im/footer/fr/prestations.gif height="17" border=0 alt=""></a><img  			src="/im/footer/fr/puce.gif" height=17 width=7 border=0 alt=""><a href="http://www.sig-ge.ch/fr/cite/infoplus/contacts.asp" onfocus="this.blur();"><img  			src="/im/footer/fr/contacts.gif" height=17 border=0 alt=""></a><img  			src="/im/footer/fr/puce.gif" height=17 width=7 border=0 alt=""><a href="http://www.sig-ge.ch/fr/cite/infoplus/faq/index.asp" onfocus="this.blur();"><img  			src="/im/footer/fr/faq.gif" height=17 border=0 alt=""></a><img  			src="/im/footer/fr/puce.gif" height=17 width=7 border=0 alt=""><a href="http://www.sig-ge.ch/fr/cite/infoplus/site_map.asp" onfocus="this.blur();"><img  			src="/im/footer/fr/sitemap.gif" height=17 border=0 alt=""></a><img  			src="/im/footer/fr/puce.gif" height=17 width=7 border=0 alt=""><a href="http://www.sig-ge.ch/fr/cite/infoplus/recherche.asp" onfocus="this.blur();"><img  			src="/im/footer/fr/recherche.gif" height=17 border=0 alt=""></a><img  			src="/im/footer/fr/puce.gif" height=17 width=7 border=0 alt=""><a href="javascript:OW2('/fr/terms.asp',600,450)" onfocus="this.blur();"><img  			src="/im/footer/fr/termes_conditions.gif" height=17 border=0 alt=""></a><img  			src="/im/footer/fr/puce.gif" height=17 width=7 border=0 alt=""><a href="javascript:OW('/fr/credits.asp',240,260)" onfocus="this.blur();"><img  			src="/im/footer/fr/credits.gif" height=17 border=0 alt=""></a></td> 	</tr> 	<tr> 		<td align=center><img  			src="/im/footer/fr/copyright.gif" height=15 width=225 border=0 alt=""></td> 	</tr> </table> </td> 	</tr> 	</table> 	</td>	 </tr>  </table>  </body> </html> 
